This early Saturday, Feb. 24, 2018, photo released by the California Highwat Patrol (CHP) shows a horse rider being arrested after failing a field sobriety test by CHP officers for DUI in a freeway Long Beach, Calif. Authorities say the drunken man made his way onto a California freeway while atop the horse. (California Highway Patrol, Santa Fe Springs via AP)

In this early Saturday, Feb. 24, 2018, photo released by the California Highway Patrol (CHP), an unidentified CHP officer, administers a field sobriety test to a rider who made his way with a white horse onto the eastbound California State Route 91 around 1 a.m., on Saturday. The rider registered a blood-alcohol level of .21 and .19 percent or more than double the legal limit. The man was arrested and booked for riding a horse while under the influence. (California Highway Patrol, Santa Fe Springs via AP)